Script: Sliding Doors Menu

I've been using this script for years and just recently was told that my webpage isn't working on Chrome. I checked my site and found that Chrome and other browsers, don't show the menu correctly. If you look at the link on Firefox, it looks just fine. Now, look at it on Chrome. Horrible and the links don't even work. Is there something I need to add/subtract from the script/html to get the menu's to work correctly on other browsers? I added a text that the menu only works on Mozilla Firefox. Not sure what else to do. Any help would be greatly appreciated.